Reef to Rainforest: Discovering Tropical Species, Places, Nature

Polka Dot Cardinalfish

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Sphaeramia orbicularis - (Cuvier, 1828)
Polka Dot Cardinalfish

A hardy but drably colored species. NOAA

[edit] Overview

Known to some marine aquarists as a "feeder cardinalfish," this species is very durable but usually fails to attract notice owing to its muted colors. In the wild, it feeds nocturnally and it will not be especially active during daylight hours in the aquarium.

Family: Apogonidae

Other common name(s):

  • Orbiculate Cardinalfish

Native range:

Habitat: Near-shore shallow water, in mangrove swamps, rocky areas, under docks.

Maximum length: 10 cm (4 in)

Minimum aquarium size: 114 L (30 gal)

Water: Marine 24 °C (297 K, 75 °F) - 28 °C (301 K, 82 °F)

General swimming level: Mid-level.

[edit] Feeding

Carnivore. Feeds on planktonic meaty foods such as krill, brine shrimp, mysid shrimp.

[edit] Aquarium Compatibility

Grows larger than some aquarists expect, and it will eat small fishes and ornamental crustaceans.

[edit] Breeding/Propagation

Male broods eggs and fry in his buccal cavity.

Image credit: SWM
Facts about Polka Dot CardinalfishRDF feed
Common name Polka Dot Cardinalfish  +, and Orbiculate Cardinalfish  +
Family Apogonidae  +
Genus Sphaeramia  +
Image credit SWM  +
Maximum length 4 in  +
Minimum aquarium size 30 gal  +
Native range Indo-Pacific  +, East Africa  +, Palau  +, Kiribati  +, Japan  +, and New Caledonia  +
Specific name orbicularis  +
Swimming level Mid-level.  +
Water max temp 301 K (28 °C, 82 °F)  +
Water min temp 297 K (24 °C, 75 °F)  +
Water type Marine  +

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